2101929261 has 4 divisors (see below), whose sum is σ = 2802572352. Its totient is φ = 1401286172.

The previous prime is 2101929259. The next prime is 2101929307. The reversal of 2101929261 is 1629291012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2101929261 - 2¹ = 2101929259 is a prime.

It is a super-2 number, since 2×2101929261² = 8836213236496012242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101929061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350321541 + ... + 350321546.

It is an arithmetic number, because the mean of its divisors is an integer number (700643088).

Almost surely, 2^2101929261 is an apocalyptic number.

It is an amenable number.

2101929261 is a deficient number, since it is larger than the sum of its proper divisors (700643091).

2101929261 is an equidigital number, since it uses as much as digits as its factorization.

2101929261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700643090.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 2101929261 is about 45846.8020804069. The cubic root of 2101929261 is about 1280.9711991555.

It can be divided in two parts, 210192 and 9261, that added together give a triangular number (219453 = T₆₆₂).

The spelling of 2101929261 in words is "two billion, one hundred one million, nine hundred twenty-nine thousand, two hundred sixty-one".